src/pagespeed/kernel/base/string_convert.cc

/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Author: jmarantz@google.com (Joshua Marantz)

#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

bool AccumulateDecimalValue(char c, uint32* value) {
  bool ret = true;
  if ((c >= '0') && (c <= '9')) {
    *value *= 10;
    *value += c - '0';
  } else {
    ret = false;
  }
  return ret;
}

bool AccumulateHexValue(char c, uint32* value) {
  int digit = 0;
  if ((c >= '0') && (c <= '9')) {
    digit = c - '0';
  } else if ((c >= 'a') && (c <= 'f')) {
    digit = 10 + c - 'a';
  } else if ((c >= 'A') && (c <= 'F')) {
    digit = 10 + c - 'A';
  } else {
    return false;
  }
  *value = *value * 16 + digit;
  return true;
}

}  // namespace net_instaweb